Series 642 OPERATION
742280ED Edition 2017-11-24 89/
5.2.2 Operation
Description / Mode Digit 1 Digit 2 Digit 3 Digit 4
PRESSURE CONTROL mode
P
0…100
= valve position (%, 0 = closed / 100 = open)
POSITION CONTROL mode
V
Valve closed
C
Valve open
O
Closed / open interlock
(Valve closed / open
by digital input)
I
HOLD (position frozen)
activated
H
ZERO running
Z
LEARN running
L
Safety mode established.
Refer to «Safety mode» for
details.
D
Power failure
F
Service request
1)
(valve
requires cleaning)
S R
Cluster address information
MA
= Master
SL
= Slave
0 . . . FE
hex
= cluster address
Freeze mode
FROZ
= valve frozen
1)
If SR is blinking alternatively with the actual mode display (e.g. P.11 ⇔ ..SR) the valve requires
cleaning.
RxD / TxD activity of RS232 communication is displayed by 2 blinking dots in digit 2.
The lower dot indicates RxD activity where the upper dot indicates TxD activity. The
indication is not real time.
5.2.3 Fatal error
Description Digit 1 Digit 2 Digit 3 Digit 4
Fatal error occurred
E
Error code. Refer to «Trouble shooting» for details
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